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当前位置: 首页 > 文章 > 肉馅高密度CO_2杀菌效果和杀菌动力学研究 核农学报 2009,23 (6) 1014-1020
Position: Home > Articles > STERILIZATION AND DISINFECTION KINETICS OF MINCED MEAT BY HIGH DENSITY CO_2 Journal of Nuclear Agricultural Sciences 2009,23 (6) 1014-1020

肉馅高密度CO_2杀菌效果和杀菌动力学研究

作  者：
孙源源;张德权;李春红;朱捷
单  位：
中国农业科学院农产品加工研究所/农业部农产品加工与质量控制重点开放实验室
关键词：
高密度CO2;肉馅;杀菌效果;杀菌动力学
摘  要：
研究了不同压力、温度和时间的高密度CO2对肉馅的杀菌效果及杀菌动力学模型,以相对均方误(RMSE)和决定系数(R2)为衡量指标考察了线性(Linear)、威布尔(Weibull)和逻辑斯谛(Log-Logistic)模型拟合的效果。结果表明:高密度CO2对肉馅的杀菌效果随处理压力、温度和时间的增加而增强;D值(使90%的细菌失活所需的时间)在50 MPa、75℃时达到最小为4.4 min,ZP值(D值降低一个对数所需增加的压力)在75℃时达到最小为60.3 MPa,ZT值(D值降低一个对数所需增加的温度)在50 MPa时达到最小为30.6℃;与Linear模型相比,Weibull和Log-Logistic模型能更好地拟合高密度CO2杀菌曲线。RMSE和R2分析表明,Weibull模型最好地拟合了高密度CO2处理下细菌失活动力学变化。
译  名：
STERILIZATION AND DISINFECTION KINETICS OF MINCED MEAT BY HIGH DENSITY CO_2
作  者：
SUN Yuan-yuan ZHANG De-quan LI Chun-hong ZHU Jie(Institute of Agro-Food Science and Technology,Chinese Academy of Agricultural Sciences/ Key Laboratory of Agricultural Product Processing and Quality Control,Ministry of Agriculture,Beijing 100193)
关键词：
high density CO_2;minced meat;microbial sterilization;disinfection kinetics
摘  要：
Sterilization and disinfection kinetic models of minced meat by high density CO_2 with different pressure,treating temperature and exposure time were investigated.The Linear,Weibull and Log-Logistic models were used to fit the survival curves,respectively.And the fitting effect of the models was evaluated by means of the relative mean square error(RMSE) and the correlation coefficient(R~2).The result showed that the disinfetion rate of bacteria increased with the increase of CO_2 pressure,treating temperature and exposure time.The minimum D value(the time of 90% bacterial killed) was 4.4 min at 50 MPa and 75℃,the minimum Z_P value(the increment of pressure causing D value decreased one log) was 60.3 MPa at 75℃,and the minimum Z_T value(the increment of temperature causing D value decreased one log) was 30.6℃ at 50 MPa.The Weibull and Log-Logistic model fits the bacterial disinfection kinetic curve better than Linear model.And analysis results of RMSE and R~2 showed the Weibull model provides best fitness for the sterilization by high density CO_2.

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